My subjective experience of Caballo closely matches that of the popular ADHD drugs and the beneficial effects are the same; motivation, focus, imperviousness to distraction along with a kick of energy and a positive mood. The major difference is that Caballo has a cognitive half-life of 4-5 hours whereas the time release amphetamines in Adderall have effects that can last 8- 10 hours. So you will probably have to take Caballo twice a day to maintain the same effect.
There have been a handful of human placebo-controlled studies, on Piracetam's positive effects for those with attention deficit challenges. From a 2008 study:
[Piracetam] therapy in ADHD children resulted in the improvement of behavioral characteristics, motor coordination as well as continuous, selective and divided attention. A response rate was 60% in patients received 70 mg/kg of [Piracetam] and 43% for [Piracetam] dosage of 40 mg/kg. The results of the study suggest more considerable positive therapeutic effects of [Piracetam] higher dose on behavioral, motor and attention characteristics in children with ADHD.
